NO. 1704. A COLLECTION OF SHELL8 FROM PERU—DALL. 179 



Bay, and MoUendo. These shells, like other limpets, are also called "senoritas, " or 

 ladies (probably from a fancied resemblance to one of the flounced petticoats favored 

 by Spanish senoras), and are used for food and bait. 



Distribution. — Wliole Peruvian province from Valparaiso to Paita. 



Shell conical, with entire apex, solid, strong; rounded ovate, vari- 

 able in height, the apex slightly in front of the middle of the shell; 

 sculpture of low, rather wide radial ribs and obscure concentric and 

 radial feeble striation; color whitish, with reticulated green markings, 

 the interspaces of the ribs with larger greenish blotches; old shells 

 may appear wholly gray outside and white inside, with a greenish 

 inner border to the shell; young ones have a brownish or greenish 

 blotch in the center. 



These shells sometimes exceed 2 inches in length. 



ACM.ffiA ORBIGNYI Dall, new name. 



Acmsea scutum Orbigny, Voy. Am. Mer., vol. 5, 1841, p. 479, pi. 64, figs. 8, 9. 



Not of EscHscHOLTZ, Zool. Atlas, vol. 5, 1833, p. 19, pi. 23, figs. 1, 2, 3. 

 Lottia punctata Gray, 1835, according to Orbigny; not P. punctata Lamarck 

 {Acmxa), 1822. 

 Patela. On rocky shores of the northeast part of San Lorenzo Island, Callao Bay. 

 Confused by the fishermen with the other species. 



Distribution. — Whole Peruvian province from Chonos archipelago 

 to Callao, Peru, and the Galapagos Islands. All these limpets seem 

 to be called Patelas or Senoritas by the fishermen. 



Shell rounded oval, conical, the apex a little anterior and directed 

 forward; surface finely radiately striate; the striae sometimes obso- 

 lete; color blackish, more or less flecked or dotted with white, with a 

 broad dark margin and dark-brown central tract which, in old shells, 

 may be obscured by a white shelly deposit. Length about 35 mm. 



SCURRIA PARASITICA Orbigny. 



Patella parasitica Orbigny, Voy. Am. Mer., vol. 5, 1841, p. 481, pi. 81, figs. 1, 

 2, 3. Not of Reeve, 1855. 

 Among other limpets collected at Mollendo. Of no economic importance. 



Distribution. — From Valparaiso, Chile, north to Mollendo, Peru. 



Shell rounded, conical, dome shaped, solid, the apex at the anterior 

 third, with the anterior slope straight, the posterior arched; surface 

 finely radially striated ; whitish or gray, with radiating blackish rays 

 of varying width; insitle white, brown in the central area, border 

 yellowish white, mottled by the external rays. Length about 20 mm. 



CHITON CUMINGSII Frembly. 



Chiton cumingsii Frembly, Zool. Journ., vol. 3, 1827, p. 198, suppl. pi. 16, fig. 3. — 



SowERBY, Conch. 111., 1841, Chiton, fig. 32. 

 Amaurochiton cumingsii Thiele, Gebiss d. Schneck., vol. 2, 1893, p. 362. 

 Barquillo. From rocks on the north side of the Callao water front and from tidal 

 pool at La Punta, Callao; also from rocks on the shore at the Chincha Islands. Of no 

 economic importance. 



Distribution. — From Chiloe Island north to Tumbes, Peru, 



